Fourths of his right to charles h



(No model.

R. STEEL. v SewingMachin'Treadle. I

Patented July 27,1880.

JLPETERS, FHOTO-LITNOGRAPKER, WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

ROBERT STEEL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF THREE- FOURTHS OF HIS RIGHT TO CHARLES H. BINNS, ADAM STEINMETZ, JR., AND CHARLES SPRING, OF SAME PLACE, ONE-FOURTH TO EACH.

SEWING-MACHINE 'II'READLE.

SPECIFICATION forming part of Letters Patent No. 230,503, dated July 27, 1880. Application filed June 19, 1880. (No model.)

To all whom it may concern:

Be it known that I, ROBERT STEEL, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania,have inventeda new and useful lmprovementin Sewing-Machine Treadles, of which the following is a specification.

My invention consists in the connection of a spring or springs with the upper end of a [O swinging treadle, which is provided at its lower end with a pedal or pedals, the springs being permanently attached to the lower side of the table-top to admit of backward and forward movement of the treadle.

The invention also consists in the combination of arms with the upper end of the treadle, and with guiding-ways, in such a manner as to steady the treadle in its line of movements, as hereinafter fully described.

:0 In the accompanying drawings, which make a part of this specification, Figure 1 is a perspective view of my improved treadle and bracket C, with which it is connected. Fig. 2 is an edge view of the same and a section 2 5 through the table-top A, the treadle being connected with the driving-wheel D. Fig.3 is an inverted view of the bracket C. Fig. 4 is a perspective view of one of the arms 6.

Like letters of reference in all the figures 0 represent the same parts.

A (seen in Fig. 2) is a section of atable-top, with which the treadle is connected. My improved treadle is composed of the rods a and a, connected together at their lower ends and 3 5 provided with pedals b b, the springs c c at the upper ends of the rods, and arms cl d, which have slides e c. The treadle is hung to the table-top by means of the bracket C, which is bolted to the under side thereof, the upper ends of the springs being riveted to the bracket, and the slide 0 e of the arms fitting in the grooveways ff of the bracket. The springs are made sufficiently elastic to admit of the backward and forward movements of 5 the treadle. In these movements there is a reciprocating movement of the slides c c of the arms 01 d in the groove ff, whereby the treadle is prevented being twisted by any unequal bearing on the pedals and a free and easy oscillation is secured..

The bracket C and one of the arms d are shown respectively in detail in Figs. 3 and 4.

The treadle is connected with the drivingwheel D by means of the connecting-rod E,

wrist-pin g, and crank-pin h, as seen in Fig. 2. s

- Instead of constructing the treadle with two rods, a a, as shown in the drawings, a single rod or bar' may be used, preferably a fiat bar, having the spring 0 riveted or welded to its v upper end. In the case of a single bar or rod there should be an arm, d, at each side, in connection with ag'roove, f, respectively.

It is found in practice that comparatively little power is required for working a sewingmachine with my improved treadle, and that only one pedal is required for ordinary work instead of two, as shown in the drawings.

I claim as my invention 1. A treadle having one or more springs, c, which are rigid extensions of the upper end of the treadle, in combination with a table-top or other permanent support, to which the upper ends of the springs are rigidly attached, substantially in the manner described, and for the purpose set forth.

2.. A treadlehai'ing a spring or springs, c, at its upper end, for suspending it to a tabletop or other support, and arms 01, adapted to be guided by ways to steady the treadle in itsline of movements, substantially as described.

3. The combination of the bracket C, having guiding ways or grooves ff, with the table-top A and treadle having arms d d, pro vided with slides c c, substantially in the manner and for the purpose set forth.

ROBERT STEEL. 

